0-30 volt regulated power supply main parts of the TL081 opamp and transistors (BD243, BD139, BC548) In addition to the display indicator volt meter circuit ICL7107 made ​​with voltmeter power solid apart from the used power supply and voltmeter... Electronics Projects, 0-2A 0-30V Regulated Power Supply Circuit "power electronic projects, power supply circuit, power supply project, " Date 2019/08/01